Dump-car.



No, 780;/53., PATENTE@ Mmm, 1905. S. om.

- l DUMP GAR.

'APPLICATION FILED JULY 11, 1903.k REHEWED DEU. 24, 1904.

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um QM TLC WP .M SU D APPLICATION FILED JULY 11. 1903. RBNEWED DEO. 24, 1904.

Patented January 24, 1905.

PATENT OFFICE.

i SPENCER OTIS, OFCHICAGO, ILLINOIS,7 ASSIGNOR TO NATIONAL COAL DUMP CAR COMPANY, OF RAPID CITY,

RATION OF SOUTH DAKOTA.

DUMP-CAR.

SPECIFICATION forming part of Letters Patent No. 780,763, dated January 24, 1905. Application filed July l1, 1903'. Renewed December 24,'1904. Serial No. 238,225.

drop-bottom portion of such car, as will more fully hereinafter appear.

The principal object of the invention is to provide a drop-bottom dump-car with simple,

economical, andefficient mechanism for opening and closing the dropbottom portions. Other objects of the invention will appear from an examination of the drawingsiand the following description and claims.

The invention consists principally in a dropbottom dump-car in which there are combined a supporting-frame portion,V a drop-bottom .portion formed of a plurality of swinging sections secured thereto, a movable bar for vand in engagement with each swinging section, and crank-shaft mechanism for moving such bar backwardly and forwardly.

The invention' consists, further and finally, in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure lis a cross-sectional elevation of one type of car as it appears when constructed in accordance with these improvements, taken on line 1 of Fig. 2 looking in the direction of the arrow; Fig. 2, a plan sectional view of a portion of the car, taken on line 2 2- of Fig. l looking in the direction of the arrow; and Fig. 3, an enlarged sectional detail taken on line 3 of Fig. 2 looking in the direction of the arrow.

In illustrating and describing these. improvements I haveonly illustrated and will describe that which I consider to be new, taken in connection with so much that is old as will properly disclose the invention to others and enable those skilled in the artY to practice the same, leaving out of consideration other and well-known elements which if set forth herein would only tend to confusion, prolixity, and ambiguity.

In constructingv a car in accordance with these improvements I make a supportingframework in which thereare combined a plurality of y longitudinal sills a, centrally disposed at each side of the longitudinal center of the car and extending substantially from end to end. On these center sills is laid a plurality of transverse deck-beams Z, which extend entirely across the car from side to side. This structure not only dispenses with the usual draft-timbers and provides for a car that may be made lower than the usual type, but also dispenses with the usual side sillsthat is, all side sills are dispensed with below the floor-level, so as to provide a free opening to the car Vwhich will'in no way interfere with the discharging portions. A body-bolster may be used in this type of car in which the center bearing c is arranged under the compression member' d, that passes under, upwardly, and outwardly from the vlongitudinal sills and is bolted to the deck-beam, as shown.

To provide a drop-bottom for this type of car and using it in connection with a centrally-located apex portion e, a plurality of swinging sections f is provided and-pivotally secured to the supporting-framework at the rear edges and at each side of the longitudinal center, all of which serves to carry loose bulky freight and discharge it economically at desired time or times,

In connection with this type of car I prefer to use side boards g and end boards la, held in position by means of side and end posts t' and y', which in turn may be secured in position by means of straps Z6.

To open and close the drop-bottom portions whenever desirable or necessary, I provide a plurality of slidingbars Z, one for each swinging section, and mount such bars longitudinallythat is, parallel with the longitudinal center of the car and with their edges in sliding en- SOUTH DAKOTA, A CORPO` gagement with the trackways m in the side of each deck-beam. These sliding bars may be provided with enlarged spool shaped pieces n, rotatably mounted thereon and engaging in turn with Z-shaped tracks p on the lower side of each swinging section. As above stated, I prefer to rotatably mount these spool-shaped portions on the sliding bars, so that they form antifrietion-rolls; but I prefer to have the actuating mechanism, which really opens and closes the doors-viz., the sliding bars Z-non-rotatable. These sliding bars may be made of any desired shape-- either square, flat, octagonal, or round in cross-section, as shown in the drawings. To reciprocate these bars, each one of them is provided with operating-levers q, engaged by crank-arms r, mounted upon crank-shafts t. A wrist-pin u forms the pivotal connection between the operating-levers and the crankarms, and while I prefer to make it independent of both it will be readily seen that it can be made integral or a rigid part of either of sueli portions. As shown in Fig. l, I prefer to make the operating-levers curved, so as to avoid Contact with the pivots or any portion of the drop-bottom portions and to more readily provide for their operating in the space formed under the central A-shaped apex portion.

To operate the parts, either or both of such crank-shafts may be Vibrated so as to move their crank-arms in the manner indicated by dotted lines in Fig. 1, which during one movement will move the sliding bar forwardly and close the door, and during the other movement will retract such bar and permit the doors to beopened.

I claim- 1. In a dump-car, the combination of a supporting-frame portion, a drop-bottom portion formed of a plurality of swinging sections secured thereto, a horizontal bar movable transversely of the car for and in engagement with each swinging section and crank-shaft mechanism for moving such bar backwardly and forwardly, substantially as described.

2. In a dump-ear, the combination of a supporting-frame, a drop-bottom portion formed of a plurality of swinging sections pivotally secured in position at each side o1 the longitudinal center of the car, a sliding bar reciprocatingly mounted in'position to engage the under side of each swinging section, operatinglever mechanism on such sliding bar, and crankshaft mechanism connected with such operating-levers to reciprocate the sliding-bar mechanism, substantially as described.

3. In a dump-car of the class described, the combination of a supporting-framework, side and end boards extending upwardly therefrom, a drop-bottom portion formed of a plurality of swinging sections pivotally secured in position at each side of the longitudinal center of the car, track mechanism on the under side of each of such swinging sections, sliding-bar mechanism in connection with the track mechanism, operating-lever mechanism in engagement with the sliding` bar, crankshaft mechanism, and crank-arms pivotally connected with the crank-shaft and operatinglevers to move the said sliding-bar mechanisms backwardly and forwardly during the vibrations of the crank-shaft, substantialllvv as described.

4. In a dump-car of the class described, the combination of a supportiiig-framework, side and end boards extending upwardly therefrom, adrop-bottom therefor formed of a plurality of swinging sections pivotally secured in position at each side of the longitudinal center of the ear, track mechanism formed of a iianged metal bar on the under side of each swinging section, a bar slidingly mounted in the su pporting-framework of the car and provided with antifriction-rolls engaging the flanged metal track, operating-levers on such sliding bar, crank-shaft mechanism vibratingly mounted in the supporting-framework, and crank-arms secured to such crank-shafts and pivotally connected with the operatinglevers to reciprocate the bars during the vibration of the crank-shafts, substantially as described.

SPICNCER O'llS. W'itnesses:

HARRY IRWIN Cnoiunn, MAUDn DARNELL. 

